Update {virtual,override} to follow C++11 style in remoting.

remoting/client/plugin/pepper_module.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/at_exit.h"
 #include "base/compiler_specific.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "remoting/client/plugin/chromoting_instance.h"
 
 namespace remoting {
 
 class ChromotingModule : public pp::Module {
  protected:
-  virtual pp::Instance* CreateInstance(PP_Instance instance) override {
+  pp::Instance* CreateInstance(PP_Instance instance) override {
     pp::Instance* result = new ChromotingInstance(instance);
     return result;
   }
  private:
   base::AtExitManager at_exit_manager_;
 };
 
 }  // namespace remoting
 
 namespace pp {
 
 // Factory function for your specialization of the Module object.
 Module* CreateModule() {
   return new remoting::ChromotingModule();
 }
 
 }  // namespace pp